PM4344

PMC-Sierra,Inc. PM4344 TQUAD ANSI specifications. Accumulators are provided for counting, ESF CRC-6 errors, Framing bit errors, Line Code Violations (LCVs), and Loss Of Frame (LOF) or change of frame alignment events. Extracts the data link in ESF, T1DM (DDS), or SLC®96 modes. Extracts selected channels. Provides a 2-frame elastic store buffer for jitter and wander attenuation. Allows insertion of selected channels through a serial port. Supports transmission of the AIS or the yellow alarm signal in all formats. Provides a digital PLL for generation of a low jitter transmit clock. Provides a FIFO buffer for jitter attenuation and transmit rate conversion. FIFO full or empty indication allows for bit-stuffing in higher rate multiplexing applications. Quad T1 Framer FEATURES Monolithic single-chip device that integrates four full-featured T1 framers and transmitters for terminating duplex DS1 signals. Supports SF, ESF, T1DM (DDS), and SLC®96 format DS1 signals. Supports unframed mode. Supports B8ZS or AMI line codes. Supports transfer of PCM and signalling data to/from 1.544 Mbit/s, 2.048 Mbit/s, 12.352 Mbit/s, or 16.384 Mbit/s backplane buses. Supports n x DS0 backplane interface for fractional T1. Provides robbed-bit signalling extraction/insertion, programmable idle and digital milliwatt code substitution, and two superframes of signalling debounce on a per-channel basis. Provides trunk conditioning which forces programmable trouble code substitut...